Tokyo: Imperial Palace & Marunouchi, The Samurai Stronghold

From Tokyo Station's Red Brick Facade to Edo Castle's Donjon Foundation, Guardhouses, and Nijubashi Bridge

Tokyo · 11 stops · 27 min audio · Generated October 2026

1. Tokyo Station Marunouchi Facade: The Red Brick Palace of Tatsuno Kingo

1-9-1 Marunouchi, Chiyoda City, Tokyo 100-0005, Japan

Step onto the wide granite plaza of Tokyo Station and behold its magnificent three-hundred-and-thirty-five-meter red brick facade, crowned by stately north and south octagonal domes and copper-clad roof peaks. Designed by Tatsuno Kingo, the father of modern Japanese Western architecture, and opened in December nineteen fourteen, this palatial transit terminal was conceived as the imperial gateway to the modernized Japanese nation, deliberately positioned facing the Imperial Palace. The rich red brickwork and white granite lintels command immediate admiration from travelers arriving from every continent.

During the Allied air raids of May nineteen forty-five, incendiary bombs incinerated the roof and shattered the magnificent interior dome plasterwork. For decades, the station functioned under a temporary two-story truncated roof, until an extraordinary five-year historic restoration project was completed in twenty-twelve, reconstructing the original three-story brick structure and majestic domes from archival blueprints. Over eight million original and reproduction red bricks were painstakingly laid by master masons, restoring the station's proud imperial stature.

Step inside either the North or South Dome to gaze up at the restored octagonal ceilings thirty meters above you. The plaster vaults are adorned with sculptural reliefs of eight eagles with outstretched wings, surrounded by decorative medallions representing eight animals of the classical Chinese zodiac, symbolizing the cardinal directions. The remaining four zodiac animals were discovered preserved at Takeo Onsen in Kyushu, also designed by Tatsuno Kingo, completing a nationwide architectural puzzle.

In the center of the facade sits a private imperial pavilion and carriage entrance, flanked by hand-forged wrought iron gates, through which foreign ambassadors still travel by imperial horse-drawn carriage to present their credentials to the Emperor, upholding century-old diplomatic court protocol that dazzles onlookers with liveried footmen and polished harness brass.

Walk straight west down the wide imperial ceremonial avenue of Gyoko-dori toward the palace moat.
2. Gyoko-dori Promenade: The Imperial Avenue of the Sun

2-2 Marunouchi, Chiyoda City, Tokyo 100-0005, Japan

Walk along the expansive pedestrian center of Gyoko-dori, a monumental seventy-three-meter-wide imperial boulevard flanked by four rows of mature ginkgo trees. In late autumn, these trees turn a brilliant golden-yellow, showering the stone pavement with leaves. Stretching straight as an arrow between Tokyo Station and the Imperial Palace moat, this ceremonial avenue is paved with red and grey granite, designed to provide an unbroken, panoramic perspective connecting modern corporate commerce with sovereign tradition. The sheer openness of the sky above is rare in Tokyo's high-rise canyon, creating an unforgettable sense of civic majesty and balance.

The name Gyoko-dori translates as the Avenue of the Imperial Procession. Opened in nineteen twenty-six following the reconstruction of Tokyo after the Great Kanto Earthquake, the central carriageway is reserved exclusively for ceremonial state processions, most notably when newly appointed foreign ambassadors are conveyed to the palace in royal horse-drawn brougham carriages. Crowds of spectators line the sidewalks whenever the rhythmic clatter of royal horse hooves and brass carriage bells signals an official state arrival.

Look at the soaring corporate headquarters framing the boulevard: this is Marunouchi, Japan's financial epicenter, home to the Mitsubishi conglomerate and multinational banks that manage trillions of yen in capital. In the late Edo period, this entire district was packed with the fortified barracks of the highest-ranking samurai clans serving the Tokugawa shogun, housing thousands of warrior retainers.

In eighteen ninety, when the cash-strapped Meiji government needed funds, they sold this entire muddy samurai wasteland to the Iwasaki family, founders of Mitsubishi, for just five million yen, transforming it into what locals jokingly called Mitsubishi-ga-hara, or Mitsubishi Prairie, before building Japan's first modern red-brick business district.

Continue west to the edge of the stone moat and turn right into the landscaped pools of Wadakura Fountain Park.
3. Wadakura Fountain Park: The Imperial Wedding Memorial

3-1 Kokyogaien, Chiyoda City, Tokyo 100-0002, Japan

Pause beside the cool cascading waters of Wadakura Fountain Park, an elegant stone sanctuary set right against the deep green moat of Edo Castle. In the center of the terrace, three large fountains shoot geysers of water eight meters into the air, surrounded by raised water channels that cascade into a wide reflecting basin. The rushing water drowns out the background hum of city traffic, creating a contemplative sanctuary amidst Tokyo's premier business district. Weeping willows sway gently along the water's edge, framing distant stone ramparts and providing peaceful shade for strollers and sketch artists.

This park holds deep imperial significance: it was originally constructed in nineteen sixty-one to celebrate the royal wedding of Emperor Akihito and Empress Michiko, who captivated the nation as the first commoner to marry into the imperial family. In nineteen ninety-five, the park was completely renovated and expanded to commemorate the marriage of their son, the current Emperor Naruhito, to Empress Masako. It celebrates the continuity of the imperial dynasty through graceful water architecture.

Cross the historic wooden Wadakura Bridge, reconstructed in nineteen fifty-three with heavy zelkova timber balustrades. Beneath the bridge lies the stone masonry of the Wadakura Moat, where massive interlocking andesite blocks placed by feudal stonemasons over four centuries ago remain flawlessly fitted together without mortar, resisting centuries of severe ground settlement, typhoons, and major earthquakes through the sheer weight of interlocking volcanic boulders.

Look across the water toward the Wadakura Gate ruins: during the Edo period, this gate served as the heavily fortified outer entrance where samurai lords submitted their swords before entering the shogun's administrative citadel, acknowledging the supreme authority of the Tokugawa ruler before walking across the inner drawbridges.

Follow the tree-lined path northwest along the moat until you reach the grand double gateway of Otemon Gate.
4. Otemon Gate: The Great Hand of the Shogun's Fortress

1-1 Chiyoda, Chiyoda City, Tokyo 100-0001, Japan

Cross the wide stone bridge spanning the outer moat and approach Otemon Gate, the principal ceremonial entrance to Edo Castle, the legendary citadel of the Tokugawa shoguns. Otemon literally translates to the Great Hand Gate, signifying that this was the formal front entrance through which visiting daimyo lords, samurai delegations, and foreign envoys passed to seek audience with the military ruler of Japan. Today, it serves as the main public portal into the East Gardens of the Imperial Palace. The sheer thickness of the masonry walls exudes military invincibility, calculated to deter even the most determined samurai rebel armies.

Notice the ingenious defensive design known as a Masugata, or square box gate. You first pass through a smaller outer wooden gate, only to find yourself trapped inside a fortified stone courtyard overlooked by high parapets, forced to make a sharp ninety-degree right turn to face the colossal inner gate. Any samurai attackers breaching the first gate would be trapped in a deadly crossfire of arrows and matchlock muskets from hidden embrasures above.

Look closely at the massive timbers of the inner gate: clad in thick, blackened iron plates and studded with heavy iron rivets, these doors were designed to resist battering rams and flaming arrows. Above the gate sits a heavy timber watchtower, or watariyagura, where samurai guards kept round-the-clock watch over the castle approach, ready to drop heavy stones and scalding liquids onto any attackers attempting to breach the iron gates.

Look at the giant polished andesite stone block just inside the courtyard: known as the Sado Stone, it was quarried on Sado Island and transported across the sea by the Maeda clan as an extravagant display of feudal loyalty and engineering power to impress the shogun.

Step through the inner portal and walk past the guardhouse toward the sprawling wooden veranda of Hyakunin-bansho.
5. Hyakunin-bansho: The Hundred-Man Samurai Guardhouse

1-1 Chiyoda, Chiyoda City, Tokyo 100-0001, Japan

Stop before the impressive, elongated wooden structure of Hyakunin-bansho, stretching more than forty-five meters along the stone path. Built in the late Edo period, this is the largest surviving guardhouse in all of Japan. Its whitewashed plaster walls, dark cedar beams, and traditional tiled roof look remarkably pristine, transporting you directly back to the tense feudal atmosphere of eighteenth-century Edo. The building once housed hundreds of flintlock firearms, heavy polearms, and samurai swords neatly racked along the interior timber walls, ready for instant deployment at the first sound of alarm bells.

The name Hyakunin-bansho means the Hundred-Man Guardhouse. Day and night, this post was garrisoned by four elite samurai companies of twenty-five men each, drawn from the Tokugawa clan's most trusted retainers: the Koga ninja gunners, the Negoro matchlock troops, the Iga ninja guards, and the Twenty-Five Horsemen. Together, these one hundred heavily armed warriors defended the inner approach to the Honmaru palace with unflinching vigilance, sworn to protect the shogun with their lives.

Whenever a daimyo lord arrived for his mandatory alternate attendance, or sankin-kotai, in Edo, his entire retinue had to dismount here. The hundred guards would rigorously inspect the lord's papers, count his samurai bodyguards, and ensure that no firearms or unauthorized weapons were smuggled into the shogun's private residence, strictly enforcing shogunate security edicts that maintained peace across Japan for over two hundred and fifty uninterrupted years.

Look closely at the stone foundation beneath the wooden pillars: the stones are dry-stacked with paper-thin precision, allowing seismic shocks to disperse harmlessly through the masonry joints, which is why this timber building has survived centuries of earthquakes without buckling or tilting.

Continue up the gentle stone ramp toward the vast lawn of the Honmaru and approach the colossal stone mound of the Tenshudai.
6. Tenshudai: The Donjon Foundation of Edo Castle Keep

1-1 Chiyoda, Chiyoda City, Tokyo 100-0001, Japan

Ascend the gentle stone ramp onto the colossal elevated platform of the Tenshudai, the massive stone keep base that once supported the crowning glory of feudal Japan: the main donjon of Edo Castle. Measuring forty-one meters by thirty-eight meters and rising eleven meters above the palace lawn, this foundation was constructed using granite boulders weighing up to ten tons each, flawlessly hand-chiseled and fitted without mortar. Standing atop this breezy stone terrace, you occupy the absolute summit of shogunate military authority, looking out over the entire Kanto plain.

Atop this stone plinth rose a breathtaking five-story black-and-gold wooden tower soaring fifty-eight meters into the sky, completed in sixteen thirty-eight under the third shogun, Tokugawa Iemitsu. It was the tallest castle tower ever built in Japanese history, visible for miles across Edo Bay and reflecting the supreme authority of the Tokugawa regime. Its gilded gables and fierce shachihoko dragon-carp roof ornaments flashed brilliantly in the morning sun.

However, in March sixteen fifty-seven, the catastrophic Great Fire of Meireki swept across Edo, killing over one hundred thousand people and reducing the magnificent castle keep to ashes. The shogun's councilors debated rebuilding the tower, but the shogun's great-uncle, Hoshina Masayuki, wisely argued that the tens of millions of yen required should instead be spent rebuilding the ruined homes and livelihoods of the common citizens. The decision stood as a landmark moment in enlightened civic leadership, demonstrating that the welfare of the people outweighed martial monuments.

The tower was never rebuilt, leaving this monumental stone terrace as an enduring monument to civic wisdom over imperial vanity. Today, you can stand upon the platform and look down over the East Gardens, with Tokyo's skyscrapers framing the horizon like modern battlements.

Walk down the eastern ramp and follow the woodland path leading into the tranquil landscape of Ninomaru Garden.
7. Ninomaru Garden & Iris Pond: The Living Painting of Kobori Enshu

1-1 Chiyoda, Chiyoda City, Tokyo 100-0001, Japan

Step onto the winding gravel path of Ninomaru Garden, where the dense city completely vanishes behind weeping willows, sculpted Japanese black pines, and terraced stone waterfalls. This enchanting nine-hectare stroll garden was originally designed in the seventeenth century by Kobori Enshu, the legendary tea master and landscape architect to the shogunate. Meticulously recreated in nineteen sixty-eight based on a historical blueprint from the ninth shogun, Tokugawa Ieshige, the garden serves as a living museum of Edo horticulture. The rustle of Japanese maple leaves and the gentle trickle of stone streams soothe the senses, creating a living masterpiece of traditional garden aesthetics.

In the center of the garden lies a winding pond filled with eighty varieties of traditional Edo irises, which burst into vivid violet, indigo, and snow-white bloom every June. Graceful wooden boardwalks cross over the water, allowing visitors to walk directly above the blooming blossoms and watching golden carp glide beneath the lotus leaves. Each iris variety bears a poetic classical name commemorating court literature, mountain waterfalls, or starry night skies.

Look closely at the fish swimming in the central pond: these are Hirenaga Nishikigoi, or Long-Finned Carp, a unique breed created through the initiative of Emperor Akihito by crossbreeding Japanese koi with Indonesian river carp, producing fish with long, flowing veil-like fins that resemble aquatic silk kimonos gliding through the dark water.

At the western edge of the garden grows a grove of two hundred and sixty trees representing every one of Japan's forty-seven prefectures, donated by citizens in nineteen sixty-eight to ensure that travelers from all corners of the country could find a piece of their homeland inside the imperial grounds.

Stroll south along the shaded woodland trail toward the southern exit, approaching the imposing stone ramparts of Kikyo-mon Gate.
8. Kikyo-mon Gate & Tatsumi Yagura: The Bellflower Watchtower

1-1 Chiyoda, Chiyoda City, Tokyo 100-0001, Japan

Pause on the stone bank outside Kikyo-mon Gate and look up at the dazzling white watchtower of Tatsumi Yagura reflected in the deep waters of the moat. Rising two stories above massive granite revetments, this three-tiered whitewashed guard tower is one of only three original watchtowers that survived from Edo Castle. Its elegant flared hip-and-gable roofs and dark copper-plated eaves present a picture-perfect vision of feudal military architecture standing proudly against the glass skyscrapers of Marunouchi. The contrast between ancient whitewashed plaster, curving copper rooflines, and modern reflective glass office towers is breathtaking to behold from the moat bank.

The name Tatsumi denotes the south-east direction according to the ancient Chinese twelve-animal zodiac. Because the southeast was considered an auspicious direction in geomancy, this watchtower was meticulously positioned to guard the corner approach while channeling positive feng shui energy into the castle's core administrative chambers. Sentries stationed inside the upper windows had an unobstructed panoramic view across the coastal flats toward Edo Bay, tracking merchant junks and fishing vessels.

The adjoining gate is known as Kikyo-mon, or Bellflower Gate, because its ceramic roof tiles are stamped with the five-petaled bellflower crest of Ota Dokan, the legendary fifteenth-century warrior poet who built the very first fortified castle on this site in fourteen fifty-seven, long before the Tokugawa shoguns transformed it into the world's largest fortress. Dokan's poetic genius, architectural vision, and military daring laid the foundation for modern Tokyo over five centuries ago.

Today, Kikyo-mon serves as the entrance gate for staff and invited guests attending private functions at the Imperial Household Agency, and on special occasions, royal vehicles glide through these historic wooden arches under police escort.

Walk south along the gravel promenade of Kokyo Gaien toward the iconic double arch of Nijubashi Bridge.
9. Nijubashi Bridge: The Double Bridge to the Imperial Sanctuary

1-1 Chiyoda, Chiyoda City, Tokyo 100-0001, Japan

Gaze across the serene waters of the inner moat at the timeless postcard vista of Nijubashi Bridge, framed by manicured black pines and the pristine white Fushimi Yagura watchtower perched on the stone cliffs behind. This is the ceremonial entrance to the Imperial Palace proper, where Emperor Naruhito and the imperial family reside. Visitors gather from around the world to photograph the graceful double-arched stone bridge reflected in the glassy water, creating a perfect circular symmetry. The dignity of the setting radiates serene imperial majesty.

The bridge you see in the foreground is actually the Seimon Ishibashi, or Main Gate Stone Bridge, constructed in eighteen eighty-seven with granite imported from the hills of Yamaguchi. The true Nijubashi, or Double Bridge, is the elegant cast-iron bridge partially visible directly behind it. In the Edo period, the inner wooden bridge had to be built with two tiers of support beams to span the deep chasm, giving it its famous name that endures to this day.

Normally closed to the public and guarded by white-gloved imperial police, these bridges are opened to ordinary citizens only twice a year: on January second for the Emperor's New Year Greeting, and on the Emperor's Birthday, when tens of thousands cross over to wave Japanese flags before the royal family on the palace balcony. The bridges serve as the sacred threshold between the sovereign and the people.

Look closely at the Fushimi Yagura tower on the embankment above the bridge: legend says this two-story fortress tower was originally built for warlord Toyotomi Hideyoshi at Fushimi Castle in Kyoto, and was dismantled beam by beam in sixteen twenty-eight and reassembled here in Edo.

Stroll southeast across the wide pine-covered lawn of Kokyo Gaien to find the bronze equestrian statue of Kusunoki Masashige.
10. Kusunoki Masashige Statue: The Paragon of Samurai Loyalty

1-1 Kokyogaien, Chiyoda City, Tokyo 100-0002, Japan

Stand before the dramatic, life-size bronze equestrian monument of Kusunoki Masashige, galloping proudly upon a granite pedestal in the southeastern corner of Kokyo Gaien. Cast in the late nineteenth century by master sculptor Kotaro Takamura and unveiled in nineteen hundred, this magnificent sculpture captures the fourteenth-century warrior clad in full samurai armor, reining in his rearing warhorse with one hand while staring resolutely toward the palace gate. The statue is celebrated as one of the three great bronze monuments of Tokyo. The powerful musculature of the bronze steed and the warrior's determined gaze command immediate awe from visitors crossing the open park lawns.

Kusunoki Masashige is revered throughout Japanese history as the ultimate paragon of samurai loyalty and devotion to the Emperor. During the Nanboku-cho wars in the thirteen-thirties, Masashige fought brilliant guerrilla campaigns for Emperor Go-Daigo against overwhelming shogunate armies. Knowing that defeat was certain at the Battle of Minatogawa in thirteen thirty-six, Masashige rode bravely into battle anyway, dying an honorable death rather than betraying his sovereign. His selfless sacrifice became a core pillar of classical samurai ethics, celebrated in epic poems, theater plays, and school histories for generations.

The statue was cast from copper mined at the famous Besshi Copper Mine and donated to the imperial household by the Sumitomo corporation. The artisans spent nearly a decade perfecting the anatomical details of the muscular warhorse and the intricate lacquered cords of the samurai armor, producing a masterpiece of Meiji-era metal casting that withstood earthquakes and wars.

Notice that Masashige's face is turned slightly away from the visitor: sculptors deliberately angled his gaze so that his eyes remain eternally fixed upon the palace gates, watching over the Emperor for all eternity without ever blinking.

Walk west along the inner moat path toward the colossal stone gateway of Sakuradamon.
11. Sakuradamon Gate: The Cherry Blossom Portal of Edo History

1-1 Kokyogaien, Chiyoda City, Tokyo 100-0002, Japan

Halt beneath the colossal timber lintels of Sakuradamon Gate, the largest surviving gate structure of Edo Castle. Originally constructed in sixteen thirty-six and designated an Important Cultural Property of Japan, this massive fortified gateway consists of an outer Koraimon gate and an inner Watariyagura tower enclosing a vast defensive courtyard. Its massive iron-plated doors, weathered cedar posts, and imposing andesite stone blocks look out across the outer moat toward the modern towers of Kasumigaseki. The sheer scale of the massive timber lintels reminds visitors of the immense power and architectural resources of the Tokugawa shoguns.

The name Sakuradamon translates to Cherry Blossom Gate, derived from the wild cherry groves that covered this plateau during the early Edo era. But on March twenty-fourth, eighteen sixty, this peaceful gate became the scene of the Sakuradamon Incident, one of the most momentous political assassinations in Japanese history, altering the nation's destiny in a single morning.

In the midst of a blinding blizzard, seventeen radical samurai from the Mito clan ambushed the heavily guarded palanquin of Chief Minister Ii Naosuke right before this gate. Ii had signed commercial treaties opening Japan to Western trade without imperial consent and executed political dissidents; his assassination shattered the authority of the Tokugawa shogunate and directly triggered the Meiji Restoration eight years later, transforming feudal Japan into a modern constitutional empire and industrial power in less than a generation.

Directly opposite the gate across the boulevard stands the headquarters of the Tokyo Metropolitan Police Department, which is colloquially referred to by Japanese citizens and news media as Sakuradamon, cementing this ancient gate's name into modern crime culture.

Take a final moment to gaze across the tranquil waters of the moat, where four centuries of samurai courage, imperial diplomacy, and modern metropolitan triumphs stand united in the heart of Tokyo.